無效的ID上更新（甲骨文）

Question

我嘗試執行以下命令：

UPDATE DB_TEST.STOCK_ITEMS 
    SET STATUS = (SELECT * 
        FROM (SELECT STOCK_ITEM_STATUS 
          FROM DB_TEST.STOCK_ITEMS_HISTORY 
          WHERE STOCK_ITEM_ID = DB_TEST.STOCK_ITEMS.ID 
          ORDER BY CHANGED_ON DESC, ID DESC) 
        WHERE ROWNUM <= 1) 
WHERE EXISTS (SELECT * 
       FROM DB_TEST.STOCK_ITEMS_HISTORY 
       WHERE STOCK_ITEM_ID = DB_TEST.STOCK_ITEMS.ID); 

但我得到的錯誤：

SQL-Error: ORA-00904: "DB_TEST"."STOCK_ITEMS"."ID": invalid identifier 

我擡頭Oracle錯誤，但我得到的是，我應該使用錯誤或缺少列名稱，但DB_TEST.STOCK_ITEMS.ID字段肯定存在。

還有什麼其他原因會導致此錯誤？

Answer 1

Oracle將表的範圍限制爲一個子查詢級別。這是解決使用問題的方法keep：

UPDATE DB_TEST.STOCK_ITEMS 
    SET STATUS = (SELECT MAX(STOCK_ITEM_STATUS) KEEP (DENSE_RANK FIRST ORDER BY CHANGED_ON DESC, ID DESC) 
       FROM DB_TEST.STOCK_ITEMS_HISTORY 
       WHERE STOCK_ITEM_ID = DB_TEST.STOCK_ITEMS.ID 
       ) 
    WHERE EXISTS (SELECT 1 
       FROM DB_TEST.STOCK_ITEMS_HISTORY 
       WHERE STOCK_ITEM_ID = DB_TEST.STOCK_ITEMS.ID 
       );